refactor: replace month dropdown with week dropdown and update related components

feat: add feedback functionality and modal for category feedback
style: add feedback button styles in CSS
docs: add explanation tab for dashboard usage instructions

assets/style.css

@@ -58,4 +58,18 @@ hr {
     .dropdown-container {
         grid-template-columns: 1fr;
     }
-}
+}
+
+.feedback-button {
+    background-color: #007bff;
+    color: white;
+    border: none;
+    padding: 5px 10px;
+    text-align: center;
+    text-decoration: none;
+    display: inline-block;
+    font-size: 12px;
+    margin: 2px 2px;
+    cursor: pointer;
+    border-radius: 4px;
+}